US3073887A - Cable vibration damper - Google Patents

Cable vibration damper Download PDF

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Publication number
US3073887A
US3073887A US73916A US7391660A US3073887A US 3073887 A US3073887 A US 3073887A US 73916 A US73916 A US 73916A US 7391660 A US7391660 A US 7391660A US 3073887 A US3073887 A US 3073887A
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US
United States
Prior art keywords
cable
arms
damper
pair
vibration damper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US73916A
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English (en)
Inventor
Sanford A Mcgavern
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schwitzer Corp
Original Assignee
Schwitzer Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schwitzer Corp filed Critical Schwitzer Corp
Priority to US73916A priority Critical patent/US3073887A/en
Priority to DESCH30638A priority patent/DE1278581B/de
Priority to GB43015/61A priority patent/GB946852A/en
Priority to FR880898A priority patent/FR1307538A/fr
Priority to SE1212561A priority patent/SE201928C1/sv
Application granted granted Critical
Publication of US3073887A publication Critical patent/US3073887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • F16F7/108—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on plastics springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound

Definitions

  • the vibrations are permitted to enter the support points, they will be transmitted to the supporting structure such as a tower and may fatigue the tower, generate tower element resonance, and shake loose nuts, bolts, rivets and the like. Aside from the effects just mentioned, if the vibrations are unchecked, their amplitude may increase or build up should condtions of resonance occur.
  • a damper which, when applied to a suspended cable near the end of the span, will take the mechanical energy of vibration from the cable and convert it to heat.
  • the damper is provided with a generally cylindrical body portion of an elastic material such as rubber or other elastomer having an aperture extending axially therethrough to receive a cable.
  • a longitudinal seam is provided in one wall of the body portion whereby the damper can be placed on the cable for clamping in position.
  • the body portion has an arm extending laterally from each side thereof and integral therewith. These arms are also referred to hereinafter as springs. The outer margins of these arms are substantially parallel to the axis of the aperture through the body portion. Another pair of arms is provided.
  • Each of these arms is joined at the outer margin of one of the aforesaid arms and extends in spaced relation therebelow and substantially parallel thereto and toward the other arm of the second pair.
  • the latter two arms are joined by a portion integral therewith and containing an inertia member which is usually made of a relatively heavy material such as steel.
  • FIG. 1 is a perspective view of a preferred embodiment of this invention.
  • FIG. 2 is a cross section of the preferred embodiment taken along the lines 2-2 of FIG. 1.
  • FIG. 3 is a side view of another embodiment of this invention.
  • FIG. 4 is a cross section taken along the lines 4-4 of FIG. 3.
  • the damper has a cylindrical body portion 13 having an aperture 14 therein through which the cable 11 passes.
  • the body portion has one wall split at rift 16 to provide means for placing the damper on the cable.
  • a flange 17 joins the body portion 13 adjacent each side of the rift 16.
  • Each flange has a longitudinal recess 18 therein to receive the clamp bars 19 drawn together by the screws 21 to fasten the damper securely to the cable.
  • An arm 22 integral with the body portion extends laterally therefrom on each side in a plane.
  • the outer margins 23 of these arms are substantially parallel to the axis of the aperture 14.
  • a lower arm 24 is joined to each of the upper arms adjacent the outer margins thereof by a thick section of the elastic material of which the damper is made.
  • the lower arms extend toward each other and generally in a plane parallel to and below the plane of the upper arms.
  • a depending portion 26 coextensive with the arms 24 houses an inertia member (not shown in FIG. 1).
  • FIG. 2 which is a section taken along the lines 2-2 of FIG. 1 shows the inertia member 27 enclosed by the elastic material of the damper.
  • the inertia member 27 which is usually made of metal has means, such as for example the holes 28 in the bottom thereof, whereby it can be located in a mold when the damper is molded. Such means might be omitted where the inertia member is adhered in place other than by molding the elastic material about it.
  • a cavity could be provided in portion 26 when the damper is molded. Then the portion could be cut to obtain a longitudinal rift to admit the inertia member to the cavity where it could then be adhered in place by any suitable bonding material.
  • metal inserts 29 Shown also in FIG. 2 are metal inserts 29 which keep the side walls from bending and keep their principal stress that of shear in the upper and lower springs.
  • FIG. 3 which is a side view of another embodiment of this invention the cable 11 passes through an aperture '44 passing through the main body portion of the damper 45.
  • This portion of the damper has a pair of extending flanged annular bosses 46 around which clamps 47 are employed to fasten the damper to the cable.
  • FIG. 4 which is a section taken along the lines 4-4 of FIG. 3 illustrates that the arms 48 adjacent the main body portion 45 do not extend in a plane but are generally curved to provide a smooth transition into the lower arms 49 which join at the portion carrying the inertia member 51.
  • a fabric reinforcement 52 may be employed if desired.
  • the vibration damper In use the vibration damper is fastened to a cable a short distance from a cable support. The vibration induced in the cable by wind produces a motion of the damper and the. inertia weight is forced to move also. However, the elastic material of the damper permits the inertia weight to have a slightly different motion from that of the cable and this results in application of shear stress to the elastic material This, motion isJma'de sev-i e al.
  • the Primarydi ad anta e f t s a r n eme t is ha br tion nodes can occur at various places along a cable and ifthsr 9E2 q cc he e e d m i s sp de the damper would be ineffective. It should be noted that he reme Q h PIfiSW nv sn au e i o ex e along a length of the cable, so that regardless of; where 1.1 96 P nt: ccu s @n he a l m e wi e p n to cable vibration.
  • the damper of this invention is effective regardlessof where node points occur on the cable Where a type of spring system is used in, a damper, relatively. large static deflections are required to reduce the natural frequency of the damper to a low speed. The large initialdeflection is increased by drift or set which occurs on a continuing basis over the li fe of; the damper.
  • the laterally extending arm structure with the arnr ends joined together provide an effe t. shmsw a mi ar n h t o ain d.
  • the present invention has damping charactersti s wh h rema n ub an l y unchanged, or improve urin h l i h mpen.
  • cable vibration damper comprising; a body. hav-. ing; means pr attachment to a cable, a first pair-of; re si lient arms formed; of a material having substantial hyt r s s Qr' htshhhl t i t hi d: a m ex endi a l rsmr ai bod i a u tlQ 'i Se d P i of resilient arms formed of; said material and extending at ash t e an i9i r portion ar g an aw sht h r he m hani en r y ner by vibrator-ymotions of the cable is dissipated in heat ene ated by e ter al ri t o in sa rms .2.
  • a cable vibration damper comprising: a body having means for attachment to a cable; a first pair of resilient arms formed of a material having substantial hysteresis of internal friction, said arms extending laterally from said body; a second pair of resilient arms formed of said material and having an arm joined to each arm of said first pair, the arms of said second pair extending toward each other below said first pair of arms and joined by a portion carrying an inertia weight whereby the mechanical energy generated by vibratory motion of the cable is dissipated in heat generated by the internal friction in said arms.
  • a vibration damper for suspended cables or the like comprising: a body portion having means to secure the damper on a cable; a first pair of resilient arms integral with said body portion and extending laterally outwardly from opposite sides, of said body portion in a plane; a second pair of resilient arms integral with said first pair, the junctions; of said arms, defining the outer margins of the arms, said armsofi said second, pair extending toward each other in; spaced relation to said first pair and joined to each other adjacent a receptacle for an' inertia weight, said arms being formed of elastic material having substantial hysteresis or internal friction; and an inertia weight disposed in said receptacle whereby the mechanical energy generated byvibratory motion of the cable is dissipated: in, heat generated by the internal friction in said arms.
  • a vibration damper for suspended cables or the lik Comprising: a body portion having means. to. secure the damper on a cable; a first pair of resilient arms. integral with saidbody portion and; extending laterally outwardly from, opposite sides of said body portion in a plane and having outer margins substantially parallel: to the axis of said; body portion; a second; pair of resilient arms integral with said first pair, the junctions ofsaid arms defining the outer margins of the arms, said arms of said second pair; extending toward each other in spaced relation to said first pair and joined to each, other adja-t cent a receptacle for an interia; Weight, said arms, being formed of an elastic material having substantial hysteresis or; internal friction; and an inertia weight disposed in said receptacle whereby the mechanical energy generated: by vibratory motion or the cable is dissipated in heat generated'by-the internal frictiorrin said arms.
  • a cable vibration damper comprising: a body having rneans for'attachment to a cable; a first pairof resilient arms extending generally laterally from said body; a second; pair of resilient arms joined; to said first pair and joined by a portion carrying an inertia weight, said, arms being formed; of elastic material having substantial hysteresis or" internal friction, whereby the mechanical ener yaenera cdh b at ry ti jof the a l is di sipated in heat generated by the internal friction in, said arms, and; rigid meansclisposed proximate the junctions of said first and second-pair. of: arms, to restrict, the principal stress generated, by vibratory motions, to that of a shear character in. said arms,

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Bridges Or Land Bridges (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
US73916A 1960-12-05 1960-12-05 Cable vibration damper Expired - Lifetime US3073887A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US73916A US3073887A (en) 1960-12-05 1960-12-05 Cable vibration damper
DESCH30638A DE1278581B (de) 1960-12-05 1961-11-30 Schwingungsdaempfer fuer Freileitungen
GB43015/61A GB946852A (en) 1960-12-05 1961-12-01 Cable vibration damper
FR880898A FR1307538A (fr) 1960-12-05 1961-12-04 Amortisseur de vibrations pour câbles
SE1212561A SE201928C1 (enrdf_load_stackoverflow) 1960-12-05 1961-12-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73916A US3073887A (en) 1960-12-05 1960-12-05 Cable vibration damper

Publications (1)

Publication Number Publication Date
US3073887A true US3073887A (en) 1963-01-15

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ID=22116561

Family Applications (1)

Application Number Title Priority Date Filing Date
US73916A Expired - Lifetime US3073887A (en) 1960-12-05 1960-12-05 Cable vibration damper

Country Status (5)

Country Link
US (1) US3073887A (enrdf_load_stackoverflow)
DE (1) DE1278581B (enrdf_load_stackoverflow)
FR (1) FR1307538A (enrdf_load_stackoverflow)
GB (1) GB946852A (enrdf_load_stackoverflow)
SE (1) SE201928C1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314503A (en) * 1965-08-31 1967-04-18 Vernon H Neubert Vibration damper
US4227038A (en) * 1977-03-18 1980-10-07 Saskatchewan Power Corporation Vibration isolator connector
US20150204474A1 (en) * 2014-01-23 2015-07-23 Hans-Jurgen Guido After the mass-spring principle operating vibration absorber
US20190376575A1 (en) * 2018-06-07 2019-12-12 Preformed Line Products Co. Vibration damper
CN114189199A (zh) * 2021-12-07 2022-03-15 阳光新能源开发股份有限公司 光伏系统及其柔性支架
US20240218912A1 (en) * 2023-01-03 2024-07-04 Preformed Line Products Co. Vibration damper

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE469665B (sv) * 1989-07-11 1993-08-16 Forsheda Ab Vibrationsdaempare foer daempning av vibrationer i en yta av ett foeremaal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1884036A (en) * 1931-11-14 1932-10-25 Albert H Vestal Cushioned cable support
US2694101A (en) * 1950-09-29 1954-11-09 Bell Telephone Labor Inc Vibration damper for transmission lines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE607078C (de) * 1934-12-17 Siemens Schuckertwerke Akt Ges Einrichtung zum Daempfen der mechanischen Schwingungen von Freileitungen
DE607079C (de) * 1934-12-17 Siemens Schuckertwerke Akt Ges Einrichtung zum Daempfen der mechanischen Schwingungen von Freileitungen
US2469167A (en) * 1946-06-11 1949-05-03 American Steel & Wire Co Vibration damper
DE1055074B (de) * 1955-09-17 1959-04-16 Preformed Line Products Co Armierungs- und Verstaerkungshuelle zum Befestigen von Draehten und Kabeln an Klemmen od. dgl.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1884036A (en) * 1931-11-14 1932-10-25 Albert H Vestal Cushioned cable support
US2694101A (en) * 1950-09-29 1954-11-09 Bell Telephone Labor Inc Vibration damper for transmission lines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314503A (en) * 1965-08-31 1967-04-18 Vernon H Neubert Vibration damper
US4227038A (en) * 1977-03-18 1980-10-07 Saskatchewan Power Corporation Vibration isolator connector
US20150204474A1 (en) * 2014-01-23 2015-07-23 Hans-Jurgen Guido After the mass-spring principle operating vibration absorber
US10203060B2 (en) * 2014-01-23 2019-02-12 Hans-Jurgen Guido After the mass-spring principle operating vibration absorber
US20190376575A1 (en) * 2018-06-07 2019-12-12 Preformed Line Products Co. Vibration damper
US11248676B2 (en) * 2018-06-07 2022-02-15 Preformed Line Products Co. Vibration damper
CN114189199A (zh) * 2021-12-07 2022-03-15 阳光新能源开发股份有限公司 光伏系统及其柔性支架
CN114189199B (zh) * 2021-12-07 2025-05-13 阳光新能源开发股份有限公司 光伏系统及其柔性支架
US20240218912A1 (en) * 2023-01-03 2024-07-04 Preformed Line Products Co. Vibration damper

Also Published As

Publication number Publication date
GB946852A (en) 1964-01-15
SE201928C1 (enrdf_load_stackoverflow) 1966-02-15
DE1278581B (de) 1968-09-26
FR1307538A (fr) 1962-10-26

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